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. 2020 Nov 27;12(12):2812. doi: 10.3390/polym12122812

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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(a) Schematic illustration of yarn battery consists of Ag nanowire/CNT and Zn nanoparticle/CNT electrodes. SEM images showing (b) the Ag yarn electrode (scale bar = 300 μm), (c) the Zn yarn electrode (scale bar = 300 μm), (d) the cross-section of the Ag electrode (scale bar = 20 μm), and (e) the cross-section of the Zn electrode (scale bar = 20 μm). (f,g) Photographs of commercial electric watch operated by two serial connected Ag-Zn yarn battery woven in textile watchstrap. Reproduced with permission from [240]. Copyright 2018 Nature.